Hydroxypropyl methyl cellulose (E 464) is identified with the single Chemical Abstracts Service (CAS) number 9004-65-3, and the European Inventory of Existing Chemical Substances (EINECS) number 232-674-9. It is manufactured reacting partially depolymerised cellulose with methyl groups and containing a small degree of hydroxypropyl substitution (Figure 11). Since cellulose is a high molecular weight linear polysaccharide of indeterminate mass and its degree of substitution will depend on the conditions of manufacture, a unique mass and structure cannot be specified. HPMC is in the form of white to off-white powder. A generalised structure of HPMC is shown in Figure 11
ConclusionExtraocularly, hpmc is used for the moisturization and protection of the corneal anterior surface by pre-corneal application throughout ophthalmologic interventions, or it is used as an adjuvant for diagnostic and therapeutic contact lenses. Additionally,hpmc is used for lubrication of IOL implantation instruments (injectors).
One of the key properties of Ashland HEC is its ability to thicken aqueous solutions and increase their viscosity. This property is particularly useful in industries such as personal care, where HEC is used in products like shampoos, lotions, and creams to provide a rich and creamy texture. In addition to its thickening properties, HEC also acts as a stabilizer, helping to prevent the separation of ingredients in formulations and improve the shelf life of products.
Medium viscosity (75,000-100,000) is primarily used for putty, as it provides good water retention.
Conclusion Hydroxyethyl cellulose, also known as HEC, is a versatile and important chemical compound used in a wide range of industries. It is a non-ionic, water-soluble polymer derived from cellulose, which is a natural polymer found in plants. HEC is commonly used as a thickening agent, stabilizer, and film-former in various products such as paints, adhesives, cosmetics, and pharmaceuticals. In conclusion, hydroxyethylcellulose's multifaceted nature has made it an indispensable material across multiple industries. Its ability to enhance product performance, stability, and user experience is unparalleled, solidifying its position as a go-to ingredient in modern manufacturing processes. As technology advances and new applications arise, the demand for hydroxyethylcellulose for sale is expected to continue growing, further highlighting its importance in our daily lives.No information on the dusting potential of the additive was made available. The analysis (by sieving) of one batch of the additive8 showed that 100% of the additive had particles smaller than 420 μm.